Difference between revisions of "Arxiv Selection Aug 2019"
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Subjects: Mesoscale and Nanoscale Physics (cond-mat.mes-hall); Quantum Gases (cond-mat.quant-gas); Strongly Correlated Electrons (cond-mat.str-el); Optics (physics.optics); Quantum Physics (quant-ph) | Subjects: Mesoscale and Nanoscale Physics (cond-mat.mes-hall); Quantum Gases (cond-mat.quant-gas); Strongly Correlated Electrons (cond-mat.str-el); Optics (physics.optics); Quantum Physics (quant-ph) | ||
| + | |||
| + | Bulk-boundary correspondence, a central principle in topological matter relating | ||
| + | bulk topological invariants to edge states, breaks down in a generic class of nonHermitian systems that have so far eluded experimental effort. Here we theoretically predict and experimentally observe non-Hermitian bulk-boundary correspondence, a fundamental generalization of the conventional bulk-boundary correspondence, in discrete-time non-unitary quantum-walk dynamics of single photons. We | ||
| + | experimentally demonstrate photon localizations near boundaries even in the absence | ||
| + | of topological edge states, thus confirming the non-Hermitian skin effect. Facilitated | ||
| + | by our experimental scheme of edge-state reconstruction, we directly measure topological edge states, which match excellently with non-Bloch topological invariants calculated from localized bulk-state wave functions. Our work unequivocally establishes | ||
| + | the non-Hermitian bulk-boundary correspondence as a general principle underlying | ||
| + | non-Hermitian topological systems, and paves the way for a complete understanding | ||
| + | of topological matter in open systems. | ||
Revision as of 03:12, 1 August 2019
Aug 1-Aug 7 Zehan Li, Aug 8- Aug 14 Jiansong Pan, Aug 15- Aug 21 Ahmet Keles, Aug 22 - Aug 28 Haiping Hu
Aug 1
arXiv:1907.12566 (cross-list from cond-mat.mes-hall) [pdf, other]
Observation of non-Hermitian bulk-boundary correspondence in quantum dynamics
Lei Xiao, Tianshu Deng, Kunkun Wang, Gaoyan Zhu, Zhong Wang, Wei Yi, Peng Xue
Comments: 15 pages, 9 figures
Subjects: Mesoscale and Nanoscale Physics (cond-mat.mes-hall); Quantum Gases (cond-mat.quant-gas); Strongly Correlated Electrons (cond-mat.str-el); Optics (physics.optics); Quantum Physics (quant-ph)
Bulk-boundary correspondence, a central principle in topological matter relating bulk topological invariants to edge states, breaks down in a generic class of nonHermitian systems that have so far eluded experimental effort. Here we theoretically predict and experimentally observe non-Hermitian bulk-boundary correspondence, a fundamental generalization of the conventional bulk-boundary correspondence, in discrete-time non-unitary quantum-walk dynamics of single photons. We experimentally demonstrate photon localizations near boundaries even in the absence of topological edge states, thus confirming the non-Hermitian skin effect. Facilitated by our experimental scheme of edge-state reconstruction, we directly measure topological edge states, which match excellently with non-Bloch topological invariants calculated from localized bulk-state wave functions. Our work unequivocally establishes the non-Hermitian bulk-boundary correspondence as a general principle underlying non-Hermitian topological systems, and paves the way for a complete understanding of topological matter in open systems.
